There were four main causes of World War I. Militarism, alliances, imperialism and nationalism.<span> The first world war was a result of these four causes, but it was triggered by the assassination of the Austrian archduke Franz Ferdinand and his wife</span>
The emergence of rock-and-roll in the united states demonstrates <span>that cultural patterns are subject to change.
When rock-and-roll music first appeared in America, it was considered rude and obscene, and ungodly. Prior to that period, very different types of music were listened to. However, as times changed, new musical genres were introduced, and rock-and-roll was one of them, with Elvis Presley and the others. </span><span /><span>
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The sun is mostly made up of gas.
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people standard of liveing was amazing during the roaring 20's and the economy was great homlessness was so low but after the stock market crash in 1929 everyone was destroyed by it homelessness and unemployment skyrocketed